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      "import vcsn"
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     "collapsed": false,
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      "b = vcsn.context('lal_char(ab)_b'); b"
     ],
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        "$\\{a, b\\}\\rightarrow\\mathbb{B}$"
       ],
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      "r = b.ratexp('a+b*+a'); r"
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        "$a + {b}^{*} + a$"
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        "$a + {b}^{*} + a + \\left(a + {b}^{*} + a\\right) \\, \\left(a + {b}^{*} + a\\right)$"
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        "$\\varepsilon + \\langle (\\frac{1}{2}, 0.44)\\rangle a + \\langle (\\frac{1}{4}, 0.1936)\\rangle aa + \\langle (\\frac{1}{8}, 0.085184)\\rangle aaa + \\langle (\\frac{1}{16}, 0.037481)\\rangle aaaa + \\langle (\\frac{1}{32}, 0.0164916)\\rangle aaaaa + \\langle (\\frac{1}{64}, 0.00725631)\\rangle aaaaaa + \\langle (\\frac{1}{128}, 0.00319278)\\rangle aaaaaaa + \\langle (\\frac{1}{256}, 0.00140482)\\rangle aaaaaaaa + \\langle (\\frac{1}{512}, 0.000618122)\\rangle aaaaaaaaa$"
       ],
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 7,
       "text": [
        "\\e + <(1/2, 0.44)>a + <(1/4, 0.1936)>aa + <(1/8, 0.085184)>aaa + <(1/16, 0.037481)>aaaa + <(1/32, 0.0164916)>aaaaa + <(1/64, 0.00725631)>aaaaaa + <(1/128, 0.00319278)>aaaaaaa + <(1/256, 0.00140482)>aaaaaaaa + <(1/512, 0.000618122)>aaaaaaaaa"
       ]
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     ],
     "prompt_number": 7
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "ctx = vcsn.context('lat<lal_char(ab),law_char(xyz)>_ratexpset<lal_char(uvw)_b>')"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "latex": [
        "$\\{a, b\\} \\times \\{x, y, z\\}^*\\rightarrow\\mathbb{B}\\,\\mathsf{RatE}\\,\\{u, v, w\\}$"
       ],
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 8,
       "text": [
        "lat<lal_char(ab),law_char(xyz)>_ratexpset<lal_char(uvw)_b>"
       ]
      }
     ],
     "prompt_number": 9
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "ctx"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "latex": [
        "$\\{a, b\\} \\times \\{x, y, z\\}^*\\rightarrow\\mathbb{B}\\,\\mathsf{RatE}\\,\\{u, v, w\\}$"
       ],
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 10,
       "text": [
        "lat<lal_char(ab),law_char(xyz)>_ratexpset<lal_char(uvw)_b>"
       ]
      }
     ],
     "prompt_number": 10
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "e = ctx.ratexp(\"<u*>'(a,xyz)'\")"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 12
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "e+e"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "latex": [
        "${u}^{*}\\,(a, xyz) + {u}^{*}\\,(a, xyz)$"
       ],
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 19,
       "text": [
        "<u*>(a, xyz)+<u*>(a, xyz)"
       ]
      }
     ],
     "prompt_number": 19
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "e.standard().info()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "ValueError",
       "evalue": "invalid literal for int() with base 10: 'N/A'",
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        "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[0;31mValueError\u001b[0m                                Traceback (most recent call last)",
        "\u001b[0;32m<ipython-input-18-fd9b67cdbb1c>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0me\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mstandard\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0minfo\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
        "\u001b[0;32m/Users/akim/src/lrde/vaucanson2/_build/34s/python/vcsn.py\u001b[0m in \u001b[0;36mautomaton_info\u001b[0;34m(aut)\u001b[0m\n\u001b[1;32m     72\u001b[0m             \u001b[0mres\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0mk\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mv\u001b[0m \u001b[0;32min\u001b[0m \u001b[0;34m[\u001b[0m\u001b[0;34m'true'\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m'1'\u001b[0m\u001b[0;34m]\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m     73\u001b[0m         \u001b[0;32melif\u001b[0m \u001b[0mk\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mstartswith\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'number '\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m---> 74\u001b[0;31m             \u001b[0mres\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0mk\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mv\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m     75\u001b[0m         \u001b[0;32melse\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m     76\u001b[0m             \u001b[0mres\u001b[0m\u001b[0;34m[\u001b[0m\u001b[0mk\u001b[0m\u001b[0;34m]\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mv\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
        "\u001b[0;31mValueError\u001b[0m: invalid literal for int() with base 10: 'N/A'"
       ]
      }
     ],
     "prompt_number": 18
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "b"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "NameError",
       "evalue": "name 'b' is not defined",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[0;31mNameError\u001b[0m                                 Traceback (most recent call last)",
        "\u001b[0;32m<ipython-input-20-3b5d5c371295>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mb\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
        "\u001b[0;31mNameError\u001b[0m: name 'b' is not defined"
       ]
      }
     ],
     "prompt_number": 20
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "b = vcsn.context('lal_char(abc)_b'); b"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "latex": [
        "$\\{a, b, c\\}\\rightarrow\\mathbb{B}$"
       ],
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 21,
       "text": [
        "lal_char(abc)_b"
       ]
      }
     ],
     "prompt_number": 21
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "a = b.ratexp('[ab]*a[ab]').derived_term(); a"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 23,
       "svg": [
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        "mutable_automaton<lal_char(abc)_b>"
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     "prompt_number": 23
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     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print(a.format('dot'))"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "digraph\n",
        "{\n",
        "  vcsn_context = \"lal_char(abc)_b\"\n",
        "  rankdir = LR\n",
        "  {\n",
        "    node [style = invis, shape = none, label = \"\", width = 0, height = 0]\n",
        "    I0\n",
        "    F2\n",
        "  }\n",
        "  {\n",
        "    node [shape = circle]\n",
        "    0\n",
        "    1\n",
        "    2\n",
        "  }\n",
        "  I0 -> 0\n",
        "  0 -> 0 [label = \"a, b\"]\n",
        "  0 -> 1 [label = \"a\"]\n",
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        "  2 -> F2\n",
        "}\n"
       ]
      }
     ],
     "prompt_number": 26
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "a2 = vcsn.automaton('''digraph {\n",
      "vcsn_context = \"lal_char(abc)_ratexpset<lal_char(uv)_b>\"\n",
      " 0 -> 1 [label=\"a,b\"]\n",
      " 0->0 [label=\"<u*>a\"]\n",
      " I-> 0\n",
      " 1 -> F [label=\"<v>\"]\n",
      " }''')"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 38
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "a2"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 39,
       "svg": [
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       "text": [
        "mutable_automaton<lal_char(abc)_ratexpset<lal_char(uv)_b>>"
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     ],
     "prompt_number": 39
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "a2.ratexp()"
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     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "latex": [
        "$\\left({u}^{*}\\,a\\right)^{*} \\, \\left(a + b\\right)\\,v$"
       ],
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 40,
       "text": [
        "(<u*>a)*(a+b)<v>"
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     "prompt_number": 40
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "a2.shortest(10)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "latex": [
        "$\\langle v\\rangle a + \\langle v\\rangle b + \\langle {u}^{*} \\, v\\rangle aa + \\langle {u}^{*} \\, v\\rangle ab + \\langle {u}^{*} \\, {u}^{*} \\, v\\rangle aaa + \\langle {u}^{*} \\, {u}^{*} \\, v\\rangle aab + \\langle {u}^{*} \\, {u}^{*} \\, {u}^{*} \\, v\\rangle aaaa + \\langle {u}^{*} \\, {u}^{*} \\, {u}^{*} \\, v\\rangle aaab + \\langle {u}^{*} \\, {u}^{*} \\, {u}^{*} \\, {u}^{*} \\, v\\rangle aaaaa + \\langle {u}^{*} \\, {u}^{*} \\, {u}^{*} \\, {u}^{*} \\, v\\rangle aaaab$"
       ],
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 41,
       "text": [
        "<v>a + <v>b + <u*v>aa + <u*v>ab + <u*u*v>aaa + <u*u*v>aab + <u*u*u*v>aaaa + <u*u*u*v>aaab + <u*u*u*u*v>aaaaa + <u*u*u*u*v>aaaab"
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     "cell_type": "code",
     "collapsed": false,
     "input": [
      "a2.eval('aab')"
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     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "latex": [
        "${u}^{*} \\, {u}^{*} \\, v$"
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       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 48,
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        "u*u*v"
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     "prompt_number": 48
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     "cell_type": "code",
     "collapsed": false,
     "input": [
      "vcsn.context('law_char(0-9)_b')"
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     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "latex": [
        "$\\{0, 1, 2, 3, 4, 5, 6, 7, 8, 9\\}^*\\rightarrow\\mathbb{B}$"
       ],
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 58,
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     "prompt_number": 58
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     "cell_type": "code",
     "collapsed": false,
     "input": [
      "e = b.ratexp('[ab]*%abab'); e"
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     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "latex": [
        "$\\left(a + b\\right)^{*} \\cap \\left(a \\, b \\, a \\, b\\right)^{c}$"
       ],
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 51,
       "text": [
        "(a+b)*&(abab){c}"
       ]
      }
     ],
     "prompt_number": 51
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "e.derived_term().determinize().minimize(\"signature\").universal()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
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       "text": [
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    {
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    }
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   "metadata": {}
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}